江阴长江公路大桥风场特性分析

Analysis of the Wind Peculiarity of Jiangyin Yangtzse River Bridge

结合江阴长江公路大桥结构健康监测系统升级改造项目,采用3向杨氏风速仪实时监测大桥桥址风场。依据实测数据进行大桥平均风特性(平均风速、风向和阵风系数)和脉动风特性(紊流强度和风谱)的统计分析。并结合GPS桥形监测系统,根据实测的CPS测点坐标数据和风速数据对风栽作用下的大桥变形特性进行分析,并对台风"麦莎"经过江阴大桥期间的风场特性以及与大桥跨中位置的横向位移的相关性进行了分析。

Arming at the Structural Health Monitoring System upgraded project of Jiangyin Yangtze River Bridge,using the Young' s anemometer to monitor the wind of the bridge site real-timely,based on the measured data,the mean wind characteristics which includes mean wind speed,wind direction and gust factor,and the fluctuating wind characteristics which includes turbulence intensity and wind spectral of the bridge are statistically analyzed.With GPS Bridge-shaped monitoring system,the GPS measured data of coordinate' s points and wind data for the bridge are used for the bridge deformation analysis under wind load.Then the correlation of the wind characteristics and of the crossbridge transverse displacement responses under the Matsa' s typhoon is collected and evaluated.